/// <summary>
/// 获得指定Sql语句查询下的数据集
/// </summary>
/// <param name="dbCommand">数据库命令</param>
/// <param name="connection">数据库连接</param>
/// <param name="transaction">数据库事务</param>
/// <exception cref="ArgumentNullException">数据库命令不能为空</exception>
/// <returns>数据集</returns>
public DataSet ExecuteDataSet(DbCommand dbCommand, DbConnection connection, DbTransaction transaction)
{
if (dbCommand == null)
{
throw new ArgumentNullException("dbCommand");
}
DataSet dataSet = null;
if (connection == null && transaction == null)
{
using (DatabaseConnectionWrapper wrapper = this.InternalGetConnection())
{
dbCommand.Connection = wrapper.Connection;
dataSet = DataSetHelper.InternalCreateDataSet(this._dbProvider, dbCommand);
}
}
else
{
this.AddTransactionAndConnectionToDbCommand(dbCommand, connection, transaction);
dataSet = DataSetHelper.InternalCreateDataSet(this._dbProvider, dbCommand);
}
return(dataSet);
}
/// <summary>
/// 返回执行指定Sql语句后影响的行数
/// </summary>
/// <param name="dbCommand">数据库命令</param>
/// <param name="connection">数据库连接</param>
/// <param name="transaction">数据库事务</param>
/// <exception cref="ArgumentNullException">数据库命令不能为空</exception>
/// <returns>受影响的行数</returns>
public Int32 ExecuteNonQuery(DbCommand dbCommand, DbConnection connection, DbTransaction transaction)
{
if (dbCommand == null)
{
throw new ArgumentNullException("dbCommand");
}
Int32 result;
if (connection == null && transaction == null)
{
using (DatabaseConnectionWrapper wrapper = this.InternalGetConnection())
{
dbCommand.Connection = wrapper.Connection;
result = dbCommand.ExecuteNonQuery();
}
}
else
{
this.AddTransactionAndConnectionToDbCommand(dbCommand, connection, transaction);
result = dbCommand.ExecuteNonQuery();
}
return(result);
}
/// <summary>
/// 使用数据库读取器执行操作
/// </summary>
/// <typeparam name="T">返回类型</typeparam>
/// <param name="command">指定Sql语句</param>
/// <param name="function">使用数据库读取器的操作</param>
/// <returns>返回的内容</returns>
public T UsingDataReader <T>(ISqlCommand command, Func <IDataReader, T> function)
{
DatabaseConnectionWrapper wrapper = null;
IDataReader reader = null;
try
{
wrapper = this.InternalGetConnection();
reader = this.ExecuteReader(command, wrapper.Connection);
return(function(reader));
}
catch
{
throw;
}
finally
{
if (reader != null)
{
reader.Close();
reader.Dispose();
}
if (wrapper != null)
{
wrapper.Dispose();
}
}
}
/// <summary>
/// 获得指定Sql语句查询下的数据集
/// </summary>
/// <param name="dbCommand">数据库命令</param>
/// <exception cref="ArgumentNullException">数据库命令不能为空</exception>
/// <returns>数据集</returns>
public DataSet ExecuteDataSet(DbCommand dbCommand)
{
if (dbCommand == null)
{
throw new ArgumentNullException("dbCommand");
}
DataSet dataSet = null;
using (DatabaseConnectionWrapper wrapper = this.GetConnection())
{
dbCommand.Connection = wrapper.Connection;
dataSet = DataSetHelper.InternalCreateDataSet(this._dbProvider, dbCommand);
}
return(dataSet);
}
/// <summary>
/// 获得指定Sql语句查询下的数据读取器
/// </summary>
/// <param name="dbCommand">数据库命令</param>
/// <exception cref="ArgumentNullException">数据库命令不能为空</exception>
/// <returns>数据读取器</returns>
public IDataReader ExecuteReader(DbCommand dbCommand)
{
if (dbCommand == null)
{
throw new ArgumentNullException("dbCommand");
}
IDataReader result;
using (DatabaseConnectionWrapper wrapper = this.GetConnection())
{
dbCommand.Connection = wrapper.Connection;
result = dbCommand.ExecuteReader();
}
return(result);
}
internal DatabaseConnectionWrapper InternalGetConnection()
{
DatabaseConnectionWrapper connection = TransactionScopeConnections.GetConnection(this);
return(connection ?? this.InternalGetNewConnection());
}
